Table 1.
Results of univariable logistic regression to identify binomial or categorical variables as risk factors for all-cause mortality in 492 cats hospitalized by the soft tissue surgery service at a veterinary teaching hospital
| Risk factors | Cats with available data (n = 492) | Survivors (n = 462) | Non-survivors (n = 30) | OR description | OR | 95% CI | P value |
|---|---|---|---|---|---|---|---|
| Significant factors | |||||||
| Sex | |||||||
| Spayed female | 492/492 (100) | 149/462 (32) | 18/30 (60) | FS vs MN | 3.2 | 1.5–7.2 | 0.021 |
| Female | 492/492 (100) | 24/462 (5) | 2/30 (7) | F vs MN | 2.6 | 0.5–9.9 | |
| Male | 492/492 (100) | 17/462 (4) | 0/30 (0) | M vs MN | 0.7 | 0.01–6.2 | |
| Castrated male | 492/492 (100) | 272/462 (59) | 10/30 (33) | – | – | – | – |
| ASA status | |||||||
| 1 | 454/492 (92.3) | 44/425 (10) | 0/29 (0) | Per 1 increase in score | 2.8 | 1.7–4.7 | <0.001 |
| 2 | 167/425 (39) | 5/29 (17) | |||||
| 3 | 180/425 (19) | 16/29 (55) | |||||
| 4 | 32/425 (8) | 8/29 (28) | |||||
| 5 | 2/425 (0) | ||||||
| Emergency surgery | 492/492 (100) | 168/462 (64) | 10/30 (33) | Y vs N | 3.5 | 1.6–7.9 | 0.001 |
| Thoracic surgery | 492/492 (100) | 35/462 (8) | 7/30 (23) | Y vs N | 3.7 | 1.4–8.6 | 0.011 |
| Pre-existing neoplasia | 492/492 (100) | 81/462 (18) | 1/30 (3) | Y vs N | 0.2 | 0.01–0.8 | 0.018 |
| Pre-existing heart disease | 492/492 (100) | 8/462 (2) | 3/30 (10) | Y vs N | 6.3 | 1.3–23.3 | 0.024 |
| Non-significant factors | |||||||
| Weekend | 492/492 (100) | 30/462 (6) | 2/30 (7) | Y vs N | 1.03 | 0.2–3.7 | 0.970 |
| After hours | 490/492 (99.6) | 32/460 (7) | 3/30 (10) | Y vs N | 1.5 | 0.3–4.5 | 0.551 |
| Pre-existing infection | 492/492 (100) | 54/462 (12) | 5/30 (17) | Y vs N | 1.5 | 0.5–4.0 | 0.437 |
| Previous surgery 1 week | 492/492 (100) | 12/462 (3) | 0/30 (0) | Y vs N | 0.6 | 0.01–4.7 | 0.695 |
| Multiple surgeries | 492/492 (100) | 22/462 (5) | 4/30 (13) | Y vs N | 3.1 | 0.9–8.8 | 0.081 |
| Clean | 491/492 (99.8) | 113/462 (24) | 10/30 (33) | Y vs N | 1.01 | 0.6–1.6 | 0.978 |
| Clean-contaminated | 283/462 (61) | 14/30 (47) | – | – | |||
| Contaminated | 19/462 (4) | 2/30 (7) | – | – | – | ||
| Dirty | 46/462 (10) | 4/30 (13) | |||||
| Abdominal surgery | 492/492 (100) | 32/462 (7) | 5/30 (17) | Y vs N | 2.7 | 0.9–7.0 | 0.084 |
| Gastrointestinal surgery | 492/492 (100) | 111/462 (24) | 8/30 (27) | Y vs N | 1.2 | 0.5–2.6 | 0.746 |
| Head and neck surgery | 492/492 (100) | 56/462 (12) | 1/30 (3) | Y vs N | 0.3 | 0.01–1.2 | 0.094 |
| Urogenital surgery | 492/492 (100) | 174/462 (38) | 10/30 (33) | Y vs N | 0.8 | 0.4–1.8 | 0.662 |
| Laparoscopic/thoracoscopic surgery | 492/492 (100) | 6/462 (1) | 0/30 (0) | Y vs N | 1.2 | 0.01–10.2 | 0.927 |
| Skin | 492/492 (100) | 86/462 (19) | 4/30 (13) | Y vs N | 0.67 | 0.2–1.8 | 0.452 |
Data are n (%) unless otherwise indicated
ASA = American Society of Anesthesiologists; CI = confidence interval; F = female; FS = female spayed; M = male; MN = male neutered; OR = odds ratio